Liquid-cooled discharge nozzle



'-Dec. 27, 1949 R. H. GODDARD LIQUZIDfCOOLED vDISCHARGE!"'NOZZLE Original Filed'MarQh 1.4, 1944 5w mu@ c Y [dim M? w@ t a www j@ Patented Dec. 27, 1949 2,492,569 Vmuon):zcoofLlz-n mscnARdE'nozzL-n Robert H. Goddard, dec

eased, late of Annapolis, dard, .executri'm flax'ton, -half "tu "nani-e1 .and

Florence Guggenheim Foundation, ew -"York, N. Y.,'-a corporation'of NewYork Original application March 14, r 1944, Serial No. 526,422, now Patent No. 2,495,785,4lated August 13, 1946. Divided and th "5 claims. (ci. masses) This .invention relates to .combustion Vcham-- bers as used in rocket apparatus 'and 'for :other similar purposes and is a division of Goddard application Serial No. 526,422 filed March 14, 1944, now Patent No. 2,405,785.

The present application relates particularly to the cooling of the discharge nozzle of such a combustion chamber by providing a liquidcooling jacket construction, as best shown in Figs. 14 and 20 of said original application.

It is the general object of the present invention to provide an improved jacket construction in which a cooling liquid is effectively sprayed on the outer surface of the discharge nozzle.

A further object is to provide a construction in which in-iiow and out-flow of the cooling medium are separated, so that any steam generated will not interfere with the in-ow of the cooling liquid. Provision is also made for maintaining uniform rates of ilow in different parts of the cooling jacket.

The invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

A preferred form of the invention is shown in the drawing, in which Fig. 1 is a side elevation of a combustion chamber, partly in section, and embodying the invention; and

Fig. 2 is an enlarged sectional plan view, taken along the line 2 2 in Fig. 1.

Referring to the drawing, Fig. l shows a combustion chamber C having a discharge nozzle N, feed pipes I and Il for combustion liquids, and an outer jacket or casing I2.

The present invention relates to the improved cooling jacket construction associated with the nozzle N, which construction comprises an outer jacket casing 20, an intermediate casing or partition 2|, an inlet pipe 22, and an outlet pipe 23. The inlet pipe 22 connects into the space S between the outer casing 23 and the partition 2l, and the outlet pipe 23 connects into the space S between the partition 2| and the nozzle N.

The partition 2| is preferably corrugated in cross section as clearly shown in Fig. 2 and is provided with narrow slots or small perforations 30 at each side of each inner rib or projection. When Water or any other cooling liquid is supplied under pressure through the pipe 22, it enters the space S and is delivered as a multiplicity' of intermingled sprays directed toward and against the outer surface of the nozzle N. The pipe 23 may be connected to Waste or, if any is application May 18,

substantial amount f df steam "is generated in the spa-ce 5S', fsuitabl-e hprovision may vbe made for utilizing this steam.

It will be noted in Fig. 1 that the outer jacket casing 20 is substantially parallel to the nozzle N but that the partition 2l is displaced outwardly toward its upper end with respect to the nozzle N and jacket casing 20. The space S is thus gradually decreased upward and away from the inlet pipe 22, while the space S is correspondingly increased upward and toward the discharge pipe 23. Both spaces S and S are thus graduated to correspond to the volume of liquid flowing through said spaces at different points, and substantially uniform flow in both spaces is thus attained.

It will also be noted that there is no reverse flow in any part of the cooling apparatus, so that any steam or Vapor which may be generated in the space S' flows directly to the outlet pipe 23 and does not interfere in any way with the in-flow of cooling liquid through the space S and perforations 30. Very effective cooling of the nozzle N is thus obtained.

Having thus described the invention and the advantages thereof, the invention is not tov be limited to the details herein disclosed, otherwise than as set forth in the claims, but what is claimed is:

l. In a combustion chamber, a discharge nozzle, and a cooling jacket for said nozzle comprising a jacket casing surrounding said nozzle and spaced substantially therefrom, an intermediate partition placed between said nozzle and said jacket casing and provided with a multiplicity of spray openings disposed longitudinally thereof and directed toward the outer surface of said nozzle, means to feed a cooling liquid under pressure to the outer space between said jacket casing and said partition, said liquid being thereupon injected by pressure through said openings in the form of sprays directed against said nozzle, and means to thereafter discharge the injected liquid from the inner space between said partition and said nozzle.

2. The combination in a combustion chamber as set forth in claim l, in which the cooling liquid is fed near one end of the cooling jacket and discharged near the opposite end of said jacket and in which the partition is relatively closer to the jacket casing and relatively more remote from the nozzle toward the discharge end of said cooling jacket, whereby a uniform rate of flow of the cooling medium is attained.

. 3. The combination in a combustion chamber as set forth in claim 1, in which the partition is longitudinally corrugated and in which the spray openings are disposed in a longitudinal series at each side of the inner crest of leach corrugation for more effective intermingling of said sprays and more uniform cooling of said nozzle.

4. The combination in a combustion chamber as set forth in claim 1, in which the partition is longitudinally corrugated and in which the spray openings are disposed in a longitudinal series at each side of the inner crest of each corrugation, and in which the sprays which are directed through said openings intersect adjacent the outer surface of said nozzle and effectively cool said outer surface.

5. In a combustion, chamber,` a discharge nozzle, and a cooling jacket for said nozzle'comprising a jacket casing surrounding said nozzle and spaced substantially therefrom, an intermediate partition placed between said nozzle and said jacket casing and providedvwith a multiplicity'of spray-openings, means to introduce a cooling liquid under pressure to the outer space between said jacket casing and said partition, said Water being injected through said spray openings to the inner space between the nozzle and partition and directly engaging the outer surface of said nozzle in said space, and means to discharge said liquid from said inner space, said liquid being introduced adjacent the extreme outer end of said nozzle and said liquid being discharged adjacent the combustion chamber at the inner end of said nozzle.

ESTHER C. GODDARD, Eecutri of the Last Wz'll and Testament of Robert H. Goddard, Deceased.

REFERENCES CITED UNITED STATES PATENTS Name Date Truax'et a1 Sept. 24, 1946 Number 

